JP3320193B2 - Cassette mold holder for injection molding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette mold holder for injection molding, and more particularly, to a cassette mold holder for injection molding capable of easily mounting a cassette mold.

[0002]

2. Description of the Related Art In an injection molding machine, a cavity mold and a core mold are attached to a fixed plate and a movable plate of a mold clamping device to perform mold clamping, and a molding material such as a thermoplastic resin is injected between them. Thus, a molded product having a desired shape is manufactured.

[0003] Therefore, in order to form a molded article having a different shape, it is necessary to replace the mold. In the case of producing a large number of products in small quantities, the dies need to be replaced frequently, which lowers production efficiency. In order to perform such an exchange operation efficiently, a cassette mold is used.
When using a cassette die, simply mount the cassette die corresponding to the molded product on the cassette die holder attached to the fixed platen and movable platen of the mold clamping device of the injection molding machine, and attach the die. It can be performed.

[0004] A commonly used cassette mold holder includes a fixed-side holder piece attached to a fixed platen,
And a movable-side holder piece attached to the movable platen. A concave portion is formed on each of these mating surfaces, and when these holder pieces are closed, a cassette mold mounting portion is formed between them. The cassette die is mounted on the cassette die mounting portion, and is positioned and fixed by a fixing pin or the like, thereby completing the mounting of the die.

[0005]

Here, the cassette mold mounting portion is formed vertically or horizontally. Then, the cassette mold is mounted while being positioned from directly above or from the side. After the mounting, the cassette mold is fixed so that the gate of the cassette mold is accurately aligned with a sprue or the like on the mold clamping device side. Further, when the cassette die is mounted from the side, the cassette die is locked with a fixing pin or the like so as not to come off.

As described above, in the related art, when mounting a cassette die, it is necessary to mount the cassette die while accurately aligning it. Also, after mounting, it is necessary to fix it at an accurate position with a fixing pin or the like.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cassette mold holder for injection molding, which allows a cassette mold to be mounted more easily than in the past.

[0008]

In order to solve the above-mentioned problems, the cassette mold holder for injection molding according to the present invention is designed so that the cassette mold mounting portion formed therewith is perpendicular to or horizontal to the vertical line or the horizontal line. It is set so as to be inclined by a certain angle, so that the work of mounting the cassette mold can be easily performed.

That is, the cassette mold holder for injection molding of the present invention comprises a fixed holder piece and a movable holder piece attached to a fixed board and a movable board of a mold clamping device of an injection molding machine, respectively. It has a first recess formed on the joint surface with the movable holder piece and a second recess formed on the joint surface of the movable holder piece with the fixed holder piece, and closes these holder pieces. by, between them, the first and second recesses, in that now the mold mounting portion capable of mounting a cassette mold composed of a cavity mold and core mold is formed, the die mounting portion, a cassette mold mounting port formed in the upper surface of the pair of the holder pieces in the closed state, in succession to the cassette die attachment port
The extending mold mounting space and the lower end of this mold mounting space
And a bottom surface for mounting a prescribed mold.
The mounting space extends from the cassette die mounting opening to the die mounting.
Inclined at a constant inclination angle to the vertical line toward the wearing bottom
It is characterized in that it extends in a predetermined direction .

[0010] By inclining the mold mounting portion in this manner, two surfaces, one of the inner peripheral wall surfaces and the bottom surface, can be used as a reference surface for cassette mold positioning. Therefore, the positioning of the cassette mold at the time of mounting is automatically performed by these two surfaces. For this reason, the work of mounting the cassette mold is simplified.

Here, in practical use, in consideration of restrictions such as the layout of each part, it is preferable that the inclination angle of the mold mounting space is about 6 degrees with respect to the perpendicular.

Further, since the outer shape of the cassette die is usually a rectangular parallelepiped, the die mounting space in which the cassette die is mounted has a substantially rectangular cross section. In this case, in order to easily insert the cassette mold, the pair of inner peripheral walls that are continuous with the mold installation opening are separated from each other toward the mold installation opening. It is preferable to form a tapered surface and make the die mounting opening larger than the die mounting space. With this configuration, the cassette mold can be easily mounted from the mold mounting port using the tapered surface as the guide surface.

Next, according to the present invention, in a cassette mold holder having a mold mounting portion for mounting a cassette mold in a lateral direction, the mold mounting portion is moved from a side of the mounting opening to a horizontal line. It is characterized in that it is inclined downward by a certain angle with respect to it.

Also in this configuration, two surfaces, one of the inner peripheral wall of the mold mounting portion and the bottom surface thereof, can be used as a reference surface for positioning the mold for the cassette. Further, even if the fixing pin or the like is not used, there is no fear that the cassette die mounted on the die mounting portion comes out of the die.

Here, it is preferable that the inclination angle of the mold mounting portion is about 6 degrees with respect to the horizontal line in practical use. Further, if the mold mounting opening is made large and a tapered surface is formed on the inner peripheral wall portion toward the mold mounting space, the cassette die can be easily inserted.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall configuration of a general horizontal injection molding machine to which the cassette mold holder of the present invention can be mounted. The injection molding machine 1 basically includes a mold clamping device 3 arranged on a gantry 2, an injection device 4, and a hydraulic and electric drive control device (not shown) arranged inside the gantry 2. Is configured. The mold clamping device 3 to which the mold is attached has a fixed platen 5 and a movable platen 6 opposed to the fixed platen 5. The movable platen 6 is moved toward the fixed platen 5 by a mold feeding cylinder 61. It is possible. The cassette mold holder 7 of this embodiment is attached and fixed to the fixed platen 5 and the movable platen 6, respectively.

FIG. 2 shows a cassette mold holder 7 of this embodiment.
Is shown. 3 and FIG. 4, respectively.
A horizontal section and a vertical section of the holder 7 are shown. As shown in these figures, the cassette mold holder 7 is composed of a fixed holder piece 8 fixed to the fixed board 5 side and a movable holder piece 10 fixed to the movable board 6 side. . The fixed-side holder piece 8 includes a mounting plate 81 to the fixed platen 5.
And a fixed-side holder piece main body plate 82 attached to the attachment plate 81, and a runner plate 83 is sandwiched between them. A sprue bush 85 on which a sprue 84 is formed is mounted at the center of the outer surface of the mounting plate 81, and this bush is fixed by a locating ring 86. Further, a first concave portion 87 having a substantially rectangular cross section is formed in the fixed-side holder piece main body plate 82, and a sprue 84 is opened on a side surface of the concave portion 87.

On the other hand, the movable side holder piece 10 is
And a movable-side holder piece main body plate 102 attached to the inner surface of the attachment plate 101. In the center of the movable-side holder piece main body plate 102, a second concave portion 103 having a substantially rectangular cross section is formed. On the side surface forming the bottom of the concave portion 103, a rectangular portion having a narrow width is continuously formed. A recess 104 having a cross section is formed. A hole 105 formed in the mounting plate 101 faces a central portion of the concave portion 104, and the hole 105 is formed in the injection molding machine 1.
Hole for the passage of an ejector rod (not shown) on the side of.

The fixed-side holder 8 and the movable-side holder 10 are fixed to the fixed platen 5 and the movable platen 6 by fasteners such as bolts, respectively, and clamped. The figure shows this state. In this state, the cassette die mounting portion 12 for mounting the cassette die 14 is defined by the concave portions 87, 103, and 104 formed on both sides. As can be seen from FIG. 2, the cassette mold mounting portion 12 of the present embodiment has the mounting opening 1 on the upper surface 7 a of the holder 7.
21 is open. The mounting space following this has a closed bottom surface 122.

Next, as shown in FIGS. 2 and 5, the cassette mold 14 of this embodiment is composed of a cavity mold 141 located on the side of the fixed holder piece 8 and a core mold 142 located on the other side. It is configured. These are in a state of being clamped in advance. A gate portion 143 is formed on the outer surface of the cavity mold 141. The other core mold 142
An ejector pin mechanism 144 is attached to the outer surface of the device. On the upper surface of the core mold 142, a handle 145 used for attaching and detaching to and from the mold mounting portion is attached. The cassette mold 14 can be attached to and detached from the mounting portion 12 from above the holder 7.

Here, the structure of the cassette die mounting portion 12 of this embodiment will be described in detail with reference to FIGS. FIG. 6 is a view of the cavity side when divided along the parting line PL in a state where the cassette mold is mounted, and FIG. 7 is a view of the core side. As shown in these figures, the upper end of the mold mounting portion 12 of the present example is a mounting opening 121, and the lower end is a bottom surface 122. The mounting space between them extends in a direction inclined by about 6 degrees toward one side with respect to the vertical line VL. That is, the central axis 12a of the mold mounting space is
It is inclined by about 6 degrees with respect to the vertical line VL. In this example,
To simplify the manufacture of the holder, the holder side 7a
The mold mounting portion 12 is formed in parallel to the holder 7 so that the holder 7 can be fixed to the fixed platen 5 and the movable platen 6 side of the injection molding machine 1 with the holder 7 inclined at about 6 degrees. .
In any case, when the holder 7 of the present example is attached to the mold clamping device of the injection molding machine 1, the cassette mold mounting section 12 is set to a state inclined about 6 degrees with respect to the perpendicular VL. You.

As described above, since the mold mounting portion 12 is inclined, one inner side surface 12 b and the bottom surface 122 function as a reference surface of the cassette mold 14. Therefore,
If these two surfaces are processed with high precision, the positioning is automatically performed only by mounting the cassette mold 14.

In this embodiment, as can be seen from FIG. 2 or FIGS. 6 and 7, the upper portions of the pair of inner surfaces 12b and 12c of the mold mounting portion 12 are tapered in a direction to open right and left. Surfaces 12d and 12e,
This upper end is continuous with the mold mounting opening 121. Therefore, since these tapered surfaces function as guide surfaces of the cassette mold 14, the mounting work of the cassette mold 14 can be easily performed.

As described above, the cassette mold holder 7 of this embodiment, when attached to the injection molding machine 1, has the cassette mold mounting portion 12 inclined at 6 degrees with respect to the vertical.
It has. Therefore, only by mounting the cassette die 14 on the mounting portion 12, the side surface 12b and the bottom surface 122 of the mounting portion function as reference surfaces, and positioning of the cassette die is automatically performed. Therefore, the operation of positioning the cassette die mounted in the mounting portion by using the fixing pin or the like as in the related art becomes unnecessary. Therefore, the work of mounting the cassette mold can be performed easily and quickly.

Also, in this embodiment, the cassette mold mounting opening is widened, and tapered surfaces 12d and 12e for guiding the cassette mold are formed on the inner surface continuous therewith.
The work of mounting the cassette mold can be easily performed.

Further, in this embodiment, as can be seen from FIGS. 6 and 7, the mounting plates 81, 10 on both sides of the holder 7 are provided.
The bottom surfaces 81a and 101a of the first device are not flat surfaces but are formed in a mountain shape. For this reason, when the holder is stored, by placing it on a sleeper or the like, the air permeability of the bottom surface can be secured, and there is an advantage that rust or the like can be suppressed from being generated in this portion.

In the present embodiment, the inclination angle of the mold mounting portion is set to 6 degrees with respect to the perpendicular, but it is also possible to set the inclination angle to another angle according to the dimensions of the holder.

In this embodiment, the holder 7 is inclined and fixed to the mold clamping device of the molding machine so that the cassette mold mounting portion 12 formed therein is inclined with respect to the perpendicular. You have set. Instead, the cassette mold mounting portion 12 may be formed in advance in a state of being inclined in the holder, and the holder itself may be mounted vertically to the molding machine.

Next, the above embodiment is an example in which a cassette mold is mounted from above. Alternatively, the cassette mold may be mounted from the lateral direction. In this case, the cassette mold mounting portion may be inclined from the mounting opening downward by a certain angle with respect to the horizontal line. Also in this case, generally, it is sufficient to incline by about 6 degrees. Even in such a case, the same effect as in the above embodiment can be obtained.

[0031]

As described above, in the cassette mold holder of the present invention, the cassette mold mounting portion is installed in the injection molding machine in a state where the cassette mold mounting portion is inclined at a fixed angle with respect to the vertical or horizontal line. It is configured as follows. Therefore, since one inner side surface and the bottom surface of the cassette die mounting portion function as reference surfaces, the cassette die is automatically positioned only by mounting the cassette die. Therefore, the mounting work of the cassette mold can be easily performed. Further, since the cassette die mounting portion is inclined, a fixing pin for fixing the mounted cassette die is not required.

Further, in the cassette die mounting portion of the present invention, the cassette die to be mounted is guided by using the inner surface continuous with the cassette die mounting opening as a tapered surface. Can be easily mounted.

[Brief description of the drawings]

FIG. 1 is a view showing a general horizontal injection molding machine to which a cassette mold holder of the present invention can be attached, (A) is a top view, (B) is a side view, and (C) is a mold. It is the elements on larger scale which show the fixed board and movable board part of a fastening device.

FIG. 2 is a schematic perspective view showing a cassette mold holder according to an embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a portion of the holder of FIG. 2 taken along line III-III.

FIG. 4 is a schematic longitudinal sectional view of a portion of the holder of FIG. 2 taken along the line IV-IV.

FIG. 5 is a view showing the cassette mold of FIG. 2 (A).
Is a top view thereof, (B) is a side view thereof, and (C) is a longitudinal sectional view thereof.

FIG. 6 is a view of the holder of FIG. 2 as viewed from the side of the cavity in a state where the holder is divided along the parting line.

FIG. 7 is a view of the holder of FIG. 2 as viewed from the core side in a state where the holder is divided along the parting line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Injection molding machine 3 ... Mold clamping device 5 ... Fixed plate 6 ... Movable plate 7 ... Cassette mold holder 8 ... Fixed side holder piece 81 ... Mounting plate 82. ..Fixed-side holder piece main body plate 10 ... Movable-side holder piece 101 ... Mounting plate 102 ... Movable-side holder piece main body plate 12 ... Cassette mold mounting part 121 ... Mounting port 122 ... Bottom surface (reference surface) 12a ・ ・ ・ Center axis of mounting portion 12b ・ ・ ・ Inner surface (reference surface) 14 ・ ・ ・ Cassette mold 141 ・ ・ ・ Cavity mold 142 ・ ・ ・ Core mold PL ・ ・ ・ Parting line VL: perpendicular

Claims (6)

(57) [Claims] 1. A fixed-side holder piece and a movable-side holder piece respectively attached to a fixed platen and a movable platen of a mold clamping device of an injection molding machine, and formed on a mating surface of the fixed-side holder piece with the movable-side holder piece. It has a first concave portion and a second concave portion formed on the mating surface of the movable side holder piece with the fixed side holder piece, and by closing these holder pieces, The first and second recesses form a mold mounting portion in which a cassette mold including a cavity mold and a core mold can be mounted, and the mold mounting portion is in a closed state. a cassette mold mounting port formed in the upper surface of the pair of the Hor <br/> loaders piece in this
A mold mounting space that extends continuously from the cassette mold mounting opening
And a mold mounting bottom surface that defines the lower end of the mold mounting space , wherein the mold mounting space is located in front of the cassette mold mounting opening.
A constant angle of inclination with respect to the perpendicular to the bottom surface for mounting the mold
A cassette mold holder for injection molding, which extends in a direction inclined at an angle . 2. The cassette mold holder for injection molding according to claim 1, wherein said mold mounting space is inclined at an inclination angle of about 6 degrees with respect to a vertical line. 3. The mold mounting space according to claim 1, wherein the mold mounting space has a substantially rectangular cross section, and a pair of opposing inner peripheral walls that are continuous with the mold mounting opening. A cassette mold holder for injection molding, characterized in that a tapered surface is formed so as to be separated from each other toward the side, and a mold mounting opening has an opening larger than a space for mounting the mold. 4. A fixed holder piece and a movable holder piece respectively attached to a fixed board and a movable board of a mold clamping device of an injection molding machine, and are formed on a mating surface of the fixed holder piece and the movable holder piece. It has a first concave portion and a second concave portion formed on the mating surface of the movable side holder piece with the fixed side holder piece, and by closing these holder pieces, the first and the second A mold mounting portion capable of mounting a cassette die composed of a cavity die and a core die is formed by the two concave portions. The die mounting portion is a pair of holders in a closed state. A cassette mold mounting opening formed on one side of the piece, a mold mounting space extending in a direction inclined downward at a constant inclination angle with respect to a horizontal line, continuously with the mounting opening; Injection molding cassette mold holder, characterized in that it is composed of a mold mounting bottom defining a bottom of the mold mounting space. 5. The cassette mold holder for injection molding according to claim 4, wherein the mold mounting space is inclined at an inclination angle of about 6 degrees with respect to a horizontal line. 6. The mold mounting space according to claim 4, wherein the mold mounting space has a substantially rectangular cross section, and a pair of opposed inner peripheral walls that are continuous with the mold mounting opening have the same shape. A cassette mold holder for injection molding, characterized in that a tapered surface is formed so as to be separated from each other toward the side, and a mold mounting opening has an opening larger than a space for mounting the mold.